In my local city, the code requires that every intrusion alarm system is permitted by the city. The code also clearly states that the permit number be displayed, residence or commercial property alike, according to this citation:
(from: OKC's Municipal Code)
If every system were permitted according to code, most front doors or entries would look like this:
I've seen maybe three doors out of thousands that comply with this code. Frankly, I understand why!
How about you? In your area, what do residential alarm permit requirements do you see? Are they required? Is displaying them required?